$#]      provisional Ozgun Ataman Safe-Inferred *Settings for retry behavior. Simply using  for default # values should work in most cases. "Number of retries. Defaults to 5. >Whether to implement exponential backoff in retries. Defaults  to True. 7The base delay in miliseconds. Defaults to 50. Without  , this is the delay. With , this base delay 6 will grow by a factor of 2 on each subsequent retry. ,Set a limited number of retries. Default in  is 5. ?Set an unlimited number of retries. Note that with this option 9 turned on, the combinator will keep retrying the action 8 indefinitely and might essentially hang in some cases. 4Delay thread using backoff delay for the nth retry. Delay thread using flat delay Delay in micro seconds %Retry combinator for actions that don't raise exceptions, but ? signal in their type the outcome has failed. Examples are the  ,  and EitherT monads. Let'?s write a function that always fails and watch this combinator 8 retry it 5 additional times following the initial run: import Data.Maybe3let f = putStrLn "Running action" >> return Nothingretrying def isNothing fRunning actionRunning actionRunning actionRunning actionRunning actionRunning actionNothingANote how the latest failing result is returned after all retries  have been exhausted. BRetry ALL exceptions that may be raised. To be used with caution;  this matches the exception on . >See how the action below is run once and retried 5 more times " before finally failing for good: =let f = putStrLn "Running action" >> error "this is an error"recoverAll def fRunning actionRunning actionRunning actionRunning actionRunning actionRunning action*** Exception: this is an error Perform + for the nth retry for the given settings. ARun an action and recover from a raised exception by potentially ( retrying the action a number of times.  1A function to check whether the result should be 5 retried. If True, we delay and retry the operation. Action to run  Just use  faor default settings 4Should a given exception be retried? Action will be  retried if this returns True. Action to perform            retry-0.3.0.0 Control.Retry RetrySettings numRetriesbackoff baseDelay RetryLimitlimitedRetriesunlimitedRetries backoffDelay flatDelaydelayretrying recoverAll performDelay recoveringdata-default-class-0.0.1Data.Default.Classdefbase Data.MaybeMaybe Data.EitherEither GHC.Exception SomeException GHC.Conc.IO threadDelayRNoLimitRLimit$fDefaultRetrySettings